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00001 // 00002 // noncopyable.hpp 00003 // ~~~~~~~~~~~~~~~ 00004 // 00005 // Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com) 00006 // 00007 // Distributed under the Boost Software License, Version 1.0. (See accompanying 00008 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 00009 // 00010 00011 #ifndef ASIO_DETAIL_NONCOPYABLE_HPP 00012 #define ASIO_DETAIL_NONCOPYABLE_HPP 00013 00014 #if defined(_MSC_VER) && (_MSC_VER >= 1200) 00015 # pragma once 00016 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) 00017 00018 #include "asio/detail/push_options.hpp" 00019 00020 #include "asio/detail/push_options.hpp" 00021 #include <boost/config.hpp> 00022 #include <boost/noncopyable.hpp> 00023 #include <boost/detail/workaround.hpp> 00024 #include "asio/detail/pop_options.hpp" 00025 00026 namespace asio { 00027 namespace detail { 00028 00029 #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) 00030 // Redefine the noncopyable class for Borland C++ since that compiler does not 00031 // apply the empty base optimisation unless the base class contains a dummy 00032 // char data member. 00033 class noncopyable 00034 { 00035 protected: 00036 noncopyable() {} 00037 ~noncopyable() {} 00038 private: 00039 noncopyable(const noncopyable&); 00040 const noncopyable& operator=(const noncopyable&); 00041 char dummy_; 00042 }; 00043 #else 00044 using boost::noncopyable; 00045 #endif 00046 00047 } // namespace detail 00048 00049 using asio::detail::noncopyable; 00050 00051 } // namespace asio 00052 00053 #include "asio/detail/pop_options.hpp" 00054 00055 #endif // ASIO_DETAIL_NONCOPYABLE_HPP